S-90089A355 0.5" ID x 0.75" OD Plastic Washers

Key Features & Benefits at a Glance

• Superior electrical insulation provided by hard fiber material, preventing current leakage and short circuits in sensitive equipment.
• Excellent corrosion resistance due to non-metallic construction, ideal for humid or chemically aggressive environments.
• Precise dimensional fit with 0.5" ID and 0.75" OD, ensuring secure seating and even load distribution for 1/2" screws.
• Reliable thermal performance with a maximum operating temperature of 230°F, maintaining integrity under moderate heat conditions.
• Guaranteed regulatory compliance with RoHS 3 and REACH standards, ensuring safety and environmental responsibility for global supply chains.
• Consistent thickness control (0.014-0.016") for uniform compression and vibration damping in assembled components.
• Lightweight and non-abrasive design protects mating surfaces from scratches and reduces overall assembly weight.

Professional Applications & Engineering Value

Engineered for demanding industrial and mechanical applications, this hard fiber flat washer solves critical challenges where metal fasteners fall short. Its gray hard fiber construction delivers reliable electrical insulation, preventing galvanic corrosion and current leakage in electrical enclosures, control panels, and machinery. The precise 0.5" inner diameter and 0.75" outer diameter ensure perfect alignment with 1/2" screw sizes, while the controlled thickness provides consistent sealing and vibration resistance. Ideal for HVAC systems, automotive assemblies, and plumbing fixtures, these non-metallic washers offer superior dielectric strength and chemical resistance, extending equipment lifespan in harsh operating conditions.

Specification Summary & Compliance

This flat washer conforms to inch system dimensions with an ID of 0.5", OD of 0.75", and thickness range of 0.014-0.016". Manufactured from hard fiber material for use with 1/2" screw sizes, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring adherence to strict environmental and safety regulations. The washer operates effectively within a maximum temperature range of 230°F, providing reliable performance across various industrial applications.